Attachment for motor-vehicle transmissions



May 5, 1925.

c. e. G. BERGSTROM ATTACHMENT FOR MOTOR VEHICLE TRANSMISSIONS Filed Aug.24, 1925 I NVENTORI CARL 6 Ci BERGSTROM.

ATTORNEYS Patented May 5, 1925.

UNITED STATES mem OFFICE.

CARL G. G. BERGSTROM, OF ST. PAUL, MINNESOTA.

ATTACHMENT FOR MOTOR-VEHICLE TRANSMISSIONS Application filed August 24,1923.

To all whom it may concern.

Be it known that I, CARL G. G. BEnosTnoM.

a citizen of the United, States, residing at insure an adequate supplyofoil free from solid particles to the bands and clutch fork employed inthe transmission casing.

The full objects and advantages of my invention will appear inconnection with the detailed description thereof, and the novel featuresof my inventive idea will be particula rly pointed out in the claims. 7In the accompanying drawings, which illustrate one form in which myinvention may be embodied,--

Fig. 1 is a longitudinal elevational sectional' view of a motorvehicletransmission showing my device in place. Fig. 2' is an end viewof the device detached. Fig. 3 is a View in section on the line 33 ofFig. 4:. Fig- 4 is a central longitudinal sectional view of the device.view of the device.

Referring to the construction shown in the drawings, the numeral 10designates the transmission casing of a motor vehicle. This casing has acovering 12. Outside of the casing are the customary brake pedal 14:,clutch pedal 16 and reverse pedal 18 which operate in connection withthe brake band 20, slow speed band 22, reverse band 24 and clutch fork25 inside the casing. Also, within the casing and secured to the crankshaft is the customary fly-wheel 26, the lower portion of which runsbelow the surface of the oil in the casing. My device includes a dishedsheet metal member having side flanges 28 provided with holes 29 forreceiving the bolts which secure the cover 12 in place. The portion ofthe device between the side flanges is depressed as shown in Figs. 3 and4, and the device when in place beneath the'cover 12 assumes theposition perforated disc l6 held in Fig. 5 isa top plan Serial No.659,043.

shown in Figs. 1 and 4 so as to be inclined and having its upper endadjacent the upper portion of the fly-wheel 26. One of the side walls atthe upper end portion is cut away to provide an opening 30 to receivethe oil thrown off by the fly-wheel whenrotating.

The bottom of the device at its upper end portion is horizontal and isprovided with an oval rib 32 within which is an opening or number ofholes 34. located directly above the bands 20, 22 and 24. The lower endportion of the device is provided with a vertical e11- closing wall 86which forms a filtering chamber open at top and bottom. The upper edgeof the wall'36 is connected with the horizontal floor portion byan-inclined floor portion 38. The lower edge of the wall 36 is providedwith an internal annular flange 40 upon which rests a perforated disc 42upon which is placed a mass of suitable filtering material 44: on thetop of which is a second place by a resilient split ring 48.

The operation and advantages of my invention will now be obvious. Oilthrown oif by the flywheel 26 passes through the opening 30, drops uponthe floor of the device and runs down to the filter which retains thesolid particles of grit and dirt carried by the oil. The filtered oil.drops from the lower 7 end of thefiltering chamber upon the clutch forkOil accumulates at the top of the filtering chamber faster than it canrun through and backs up on an inclined bottom 38 and over the rib 32 soas to drop on the bands 20, 22- and 24. The provision of the oval rib 82prevents most of the oil which is thrown by the fly-wheel. upon thehorizontal .floo'r port-ion from reaching thebands until 7 portion ofthe floor of said member having an opening positioned above the bands ofthe transmission, and means for preventing particles of grit frompassing to said'openlng.

2. An attachment for motor vehicle transmissions comprising a dishedsheet metal member for catching oil thrown off from the fly-wheel, saidmember having a horizontal [loor and an inclined floor leading from saidhorizontal floor a filter at the lower end of said inclined flooradapted to deliver oil to the clutch fork, and a longitudinallyextending oval rib on said horizontal floorsignature.

CARL G. G. BERGSTROh l.

